Common symptoms of B12 deficiency include: Persistent and unexplained fatigue or weakness Lightheadedness or dizziness Pale or yellowish skin Tingling or numbness in hands and feet Muscle weakness Trouble with balance Memory problems or difficulty concentrating (brain fog) Mood changes (irritability, depression) Sore, red tongue (glossitis) If youre experiencing these symptoms, its absolutely crucial to consult your GP
The hair-growth interest comes from a line of animal research: T4 was shown to increase hair growth in rats and mice by activating hair-follicle stem cells in the bulge region, per PubMed (Philp et al., 2003, DOI), with follow-up work showing faster regrowth in T4-overexpressing mice and slower regrowth in knockout mice via VEGF and P38/ERK/AKT signalling (Gao et al., 2015, DOI)
However, since February 2026, it has been reclassified to Category 1 status, which allows it to be legally compounded and prescribed by licensed physicians
Heavier individuals may require higher doses to achieve equivalent NNMT inhibition due to larger adipose tissue mass and potentially higher baseline NNMT activity
This medication is given by injection into a muscle or under the skin as directed by your doctor
The purity assessment criteria for research-grade materials are generally much less rigorous, partially incomplete, and/or poorly followed, per a 2014 paper.21 Additionally, while some studies state that BPC-157 has good oral bioavailability based on its stability in human gastric juice, little if any research has investigated the differences in bioavailability between BPC-157 routes of administration.22 We could find only a single rat study that used oral BPC-157.23 So the best option would be an injectable form of BPC-157 from a reputable clinic
